You'll find companions wherever you go, when you travel in Trains, family or solo.

1. If you wanna go to Shirdi, no need to get off at NSL, just stay in the same transport.
2. From SC LPi, 320 people can travel per trip at night time which is a good timing to go to Shirdi. Similarly, from CCt 420 people, from RJY and VJA 260 people can go per trip.
3. The quota for SC is 104 and today there are only 16 people in the waiting list, but you said that there are a lot of travelers going to SC. Out of the total of 225 people, half of them would have booked tickets from CCt, RJY to SC and Shirdi and the other half to SC. Since SC is a direct overnight train to Shirdi, there will be many bookings, making 105 seats available as of now.